C / C++ / MFC Discussion Boards

tagopi13-Feb-13 22:29

13-Feb-13 22:29

Hello Everybody,

I am new to MFC. I used the application wizard to create a SDI application, I was able to replace the existing menu and toolbar.

In this, I added a dialog with some controls. Now, what I need is, whatever the details I got from the dialog controls, I need to display the document view.

On CView::OnDraw,I added the code like this.

<code>
CSDITestDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
if (!pDoc)
return;

pDC->TextOut(20, 20, L"test sdi", 10);
</code>

This text is writing only once in the beginning. On closing the dialog, this function is not called, how can I do that?

I tried with UpdateAllViews and OnUpdate also.

Thanks in advance.

A. Gopinath.

Re: CView::OnDraw - related question

Sivaraman Dhamodharan13-Feb-13 23:26

Sivaraman Dhamodharan

13-Feb-13 23:26

On CView::OnDraw,I added the code like this

Really?

Programming Article

Re: CView::OnDraw - related question

tagopi13-Feb-13 23:40

tagopi

13-Feb-13 23:40

Ok, I understood what you are trying to say.

I added this line only in the existing function.

pDC->TextOut(20, 20, L"test sdi", 10);

Also, I would request you to read the "How to answer the question", especially, 3rd point.

Re: CView::OnDraw - related question

Richard MacCutchan13-Feb-13 23:51

Richard MacCutchan

13-Feb-13 23:51

You need to show some more of your code, as it is not obvious where these different events occur. Pleas also use <pre> tags around your codeblocks so they are readable, like this:

C++

CSDITestDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
if (!pDoc)
      return;
 
pDC->TextOut(20, 20, L"test sdi", 10);

Re: CView::OnDraw - related question

tagopi14-Feb-13 0:14

tagopi

14-Feb-13 0:14

Thanks for you reply.

Actually, I created one MFC Application using the Template, and its SDI. So, it creates list of files, Doc, View, etc. For View, i select the base class as CView (in the wizard itself).

I removed the default created menu and included my menu list.

Now, i added a simple dialog, and for that, I created a class also derived from CDialog. Following are the .h and .cpp file contents

.h file

C++

class CSelectOptionsDlg : public CDialog
{
public:
	CSelectOptionsDlg(CWnd* pParent = NULL);
	virtual BOOL OnInitDialog();

public:
	enum {IDD = IDD_SELECTOPTIONSDLG};

public:
	void OnOkClicked();

	DECLARE_MESSAGE_MAP()  
};

.cpp

C++

CSelectOptionsDlg::CSelectOptionsDlg(CWnd* pParent)
	: CDialog(CSelectOptionsDlg::IDD, pParent)
{

}


BEGIN_MESSAGE_MAP(CSelectOptionsDlg, CDialog)

	ON_COMMAND(IDOK, OnOkClicked)

END_MESSAGE_MAP() 

void CSelectOptionsDlg::OnOkClicked() 
{
	AfxMessageBox("Ok clicked");

	EndDialog(1);	
}

BOOL CSelectOptionsDlg::OnInitDialog()
{
	CDialog::OnInitDialog();
	return TRUE;
}

As I mentioned earlier, if i add this line in OnDraw, its drawing on the first time only,

C++

pDC->TextOut(20, 20, L"test sdi", 10);

Also, in MainFrm.cpp file,

C++

BEGIN_MESSAGE_MAP(CMainFrame, CFrameWnd)
	ON_WM_CREATE()
	ON_COMMAND(ID_START, OnStartPlan )  
	ON_COMMAND(ID_STOP, OnStopPlan ) 
	ON_COMMAND(ID_SELECTOPTIONS, OnSelectOption ) 
	ON_COMMAND(ID_EXIT, OnExit ) 
END_MESSAGE_MAP()

C++

void CMainFrame::OnSelectOption()
{
	CSelectOptionsDlg cSODlg;
	cSODlg.DoModal();	
}

doing like this.

OnDraw is not calling everytime. What I need is, whenever i click ok and close the dialog, OnDraw need to be called. How can i do that? Any help.

Thanks.

Re: CView::OnDraw - related question

Richard MacCutchan14-Feb-13 0:41

Richard MacCutchan

14-Feb-13 0:41

As far as I recall from my MFC days, a Window's OnDraw() procedure will get called when the dialog closes, so this should happen automatically. Unfortunately that's the part of the code that you did not show us. You may like to add some breakpoints and use your debugger to see the flow of code when the dialog closes.

Re: CView::OnDraw - related question

tagopi14-Feb-13 1:33

tagopi

14-Feb-13 1:33

Hello Richard,

I debug the whole code by putting breakpoints in all the functions, after closing the dialog, its not going anywhere in the code, remains on the application itself.
I am attaching the code herewith. Please download and check.

http://www.4shared.com/zip/eDwcyehu/SDITest.html[^]

Thanks.

Re: CView::OnDraw - related question

Richard MacCutchan14-Feb-13 1:41

Richard MacCutchan

14-Feb-13 1:41

Sorry, I cannot download that. you need to check that your OnDraw() function is being activated properly. If necessary you may need to add a call to UploadAllViews() after the dialog closes.

Re: CView::OnDraw - related question

chaau14-Feb-13 13:26

chaau

14-Feb-13 13:26

To force the window to redraw (any window, not only view) you need to call CWnd::Invalidate()[^] method. Calling it will trigger all the drawing routines

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.